Drilling and tanging machine



Dec. 8, 1953 H. J. HOUCK ETAL DRILLING AND TANGING MACHINE 7 Sheets-Sheet 1 Filed June 11, 1948 m M 4% mm lm m E V m m J0. 0 m m w a w N Dec. 8, 1953 H. J. HOUCK ETAL 2,661,523

DRILLING AND TANG-ING MACHINE Filed June 11, 1948 7 Sheets-Sheet 2 INVENTORS f/OOPE/Z J- l/OUCK BY ,e/omgo A7- Maeamv Dec.8, 1953 H. J. HOUCK EI'AL DRILLING AND TANGING MACHINE 7 Sheets-Sheet 3 Filed June 11, 1948 ,m qq

1 flTTOENEYS Dec. 8, 1953 H. J. HOUCK ETAL 2,661,523

DRILLING AND TANGING MACHINE Filed June 11, 1948 7 Sheets-Sheet 4 I INVENTORS #001 22 J. 1/0 uc/r ii y Mam/P0 M. Mom/w I %2L THE/R 4 TTO/P/VE Y5 7 Sheets-Sheet 5 LTi Hfi 5 v QR: ..l llli lalll INVENTORS o s? J Hal/cl! ATTdlP/YfYS H. J. HOUCK EI'AL DRILLING AND TANGING MACHINE 1Q Amm v Q Dec. 8, 1953 Filed June 11, 19 48 5 34.10 wziimm 2 :two: Z emit-30 wZMQmD Dec. 8, 1953 .Filed June 11,1948

n m b w 2 V nu m z INVENTORS lloa te J- floucx 210/420 M M0264 W, W 4% 9 7 Eve ATTOJQ EXS Dec. 8, 1953 H. J. HOUCK ETAL 2,661,523

DRILLING AND TANGING MACHINE Filed June 11, 1948 7 Sheets-Sheet 7 IN V EN TORS $0, 51? J- #0 uc/r 77/5 9 flTTO/ZNEYS Patented Dec. 8, i953 STATES TENT OFFICE Application June11, 1948, Serial N 32,290 7 Claims; (01. 29-33) This invention relates to a machine for drilling a sexni-circuiar bearing and forming a tang one of its straight edges.

It is among the objects of the present invention to provide a machine into which semi-circular hearings may be placed, the machine then conveying said hearing through it, during which time each hearing is properly drilled and provided with a tang projecting outwardly from one of its straight edges.

A further object of the present invention is to provide a machine capable of receiving semicircularly shaped bearings and conveying each hearing progressively from one station into an other, said machine having apparatus for drilling a hole in the bearing, said apparatus being adjustahly attached to the machine so that the position of the hole may be varied both longitudinally of the hearing and circumferentially ther of if desired.

Further objects and advantages of the present invent will be apparent from the following de-ccript n, reference being had to the accompanying drawings, wherein a preferred embodiment of the present invention is clearly shown.

In the drawings:

Fig. 1 is a side view of the machine, pipe con nections and other incidental elements of the machine being omitted for the sake of clarity.

Fig. 2 is part end section taken along the line 2-i of Fig. i and clearly illustrates the clamping and drilling mechanism.

Fig. 3 is an end view of the machine illustratg the tanging mechanism.

4 is a view taken along the line e s of l.

5 is a front view of one of the bridging arches, supporting the retainer mechanism or" the machie.

Fig. i is a side view of the element shown in Fig. '2' is a fragmentary sectional view detailedlg showing the ring shaped machine member in which the drill supporting bracket isrotatably 1g. 8 is a perspective view of the bearing operated upon by the machine.

9 is fragmentary detail section illustrating one of pusher in the shifter bars.

Fig. 16 a fragmentary detail section illustrating another type of pusher in the shifter bar immediately preceding the locating detent at the di ling station in the machine.

Fig. 11 simplified plan view of the complete shifter mechanism and its cooperating ret-.i

shown in Fig; 13,

Fig. 12 is a fragmentary view detailedly showing that portion of the shifter mechanism adjacent the tanging station. n V

Fig. 13 is across sectional view at enlarged scale, takenalong the line 13-!3 of Fig. 11. I

Fig. 14 is an enlarged plan view of the pusher and locating stop at the tanging station G of Fig. 11. v v V Fig. 15 is a diagrammatic view of the controlling mechanism for timing of the various operations of the machine.

Fig. 16 is a timing chart.

Fig; 17 is a spread View of the timing control mechanism, each element thereof being shown connected with the machine element controlled thereby;

Fig. 18 is a perspective View of a machine built according to the present invention and including two drilling mechanisms to provide the hear ing with two separate holes. I

The body of the machine comprises a base to which two stai-idaids' 2i arid 22 are attached; Standard it has; a head bracket 23 secured thereto and a similar head bracket 26 is provided on the standardii. Both head brackets 23 and 28 support a bed plate 25 (see Fig. 1, left end) which forms the working platform of the machine.

.Staticn-to-statzon conveying mechanism 'Ihe preser'it machine is adapted to receive bearings from suitable introducing device it which places each individual hearing (all upon the working platform so that the two fiat edges 1 the semi-'circuiar'bearm'g rest upon said platform. After the hearing Si isplaced upon the bed plate 25, a'recipr'o'cating shifter 32 moves the hearing progressively into a plurality of successive stations, A to G massive, at one of which the bearing is drilled and at another provided with a tang.

The shifterSZ, which moves back and forth upon'the bed plate a predetermined distance com prises two sections, one section beingtwo spaced parallelbars 3-5 and 3t; the'other a shift'ahle central core plate 35'. Figs, 9 to 14 inclusive illustrate the" shifter construction and its details. These two shi'fter'sections' are secured together by a bridging element 35 having three longitudinal ribs, the" central one numbered 3? which, as

extends throu'gli' a longitudinal slot 37a in the'bed. plate 25 andfis' secured to the shiftable core portion 35, the other two ribs-38 and 35% extending along the two outer edges of the bridging element at, each rib is ans as extending through a slot 38d and 39a, respectively,

3 in the bed plate, parallel to the central slot therein, the rib 38 having the bar 33 attached thereto and rib 39 the bar 3d. Thus this bridging element 36 secures the parallel bars and the central core sections of the shifter together so that both can be reoiprocated as a unit.

A box-like structure Qt covering the shifter 32 and secured to the bed plate forms a housing at the one end of the machine which secures the shifter to the machine so that it may slide on the bed plate. Within this housing M3 the two parallel shifter bars 33 and 34 are secured together by a member ii which has spaced cars 42 depending from it, through a slot in the bed plate, and to which the end of the piston rod 43 of the hydraulic cylinder 45 is attached. The cylinder it is hingedly anchored to a bracket t5 secured to the standard 2i. Cylinder M is connected to any source of fluid power and may be energized thereby to reciprocate the shifter.

' The device of any suitable design is adapted to introduce bearings, one by one into the machine so that the bearing is placed between the two parallel shifter bars 33 and 3% with its two straight edges resting upon the bed plate 25 on which the bearing slides as it is being moved progressively to successive stations in the machine. The Fig. 11 is a view showing the stations B to G inclusive into which the bearings are moved by the shifter 32. The station A is the initial station in which the bearing is placed by the device 30.

To move the bearings along with the shifter bars 33 and 34 as they are reciprocated through a predetermined range of to and fro movement by the rod 43 of cylinder 44, each shifter bar has a plurality of pushers til each secured in a recess in the bar, said recesses being equally spaced a distance substantially equal to the range of reciprocation of the shifter assembly 32. Fig. 9 illustrates one form of pusher while another form is shown in Fig. 10. In the first form, the pusher 5b is a hook-shaped element made of spring wire, one end of which is inserted in an opening in the wall of recess 55 while the other engages an offset in the opposite wall of the recess so that normally the portion 52 of said pusher extends beyond the inner surface of the shifter bar 34 and into the path of movement of the bearing 3i so that as the bar 34 moves to the right as regards Fig. 9, the bearing, engaged by the pusher 59, must necessarily move with it toward the next station. The other form of pusher comprises a dog sec hinged in the recess 5IC on pin 52C. A spring 53 is anchored at one end to bar 34, its free end engaging dOg etc ncrmally to urge it into engagement with the stop pin 540 so that a portion of the dog extends beyond the surface of bar 3%, one face of said portion being at right angles to the bar, for engaging bearing 3| to move it with the bar when it moves toward the right as regards Fig. 1c, the other face of said portion sloping with regard to the bar so that the dog may move into the bar when its movement is reversed and said pusher must pass a bearing in order to get behind it.

The schematic layout in Fig. 11 shows the adjacent facing surfaces of the shifter bars 33 and 34 as having pushers extending therefrom at each station A to G inclusive, the pushers at each station being directly opposite. Pushers 59A are adapted to engage and move bearing into station B when the shifter 32 is moved out of its normal position by cylinder 55. Upon the return movement of the shifter toward normal position, the pushers 5613 will be moved into their respective recesses in the bars as they pass the bearing at station E, to get behind it so that when the shifter is again moved forwardly out of normal position, pushers 568 may move the bearing into station C. Pushers 555C are operative to transfer the bearing at station G into station D, pushers EQD move the bearing into station E, pushers EE move bearing into station F, pushers Eel move bearing into station G and pushers 50G move bearing off the shifter and out of the machine.

It will be noted that pushers 59F and EGG are carried in slots provided in the core portion 35 of the shifter 32 with which the bearing moves as it passes from station E. Figs. 11 to 13 inclusive illustrate this. Fig. 14 shows the pushers tiiG which are identical to the pushers EiiF. Pushers see are dogs hinged on pins 5? in a transverse recess in the surface of the central core, shiftable plate 35 engaged by the plate 51 attached thereto. A hair-pin shaped spring 58 is interposed between the pair of pushers iiiiG urging them outwardly against pin stops E9 in plate 35. In this normal position the pushers extend beyond the respective side edges of late 35 into the path of movement of the bearing supported thereon so that as plate 2.5 is moved'outwardly (to the right as regards Fig. .4) the bearing engaged by the pushers must move along with said plate.

As has previously been described, plate 35 is attached to pusher bars 33 and 34 through the bridging element 36. A centrally slotted supporting plate is attached to the bed plate 25 and forms a support for an intermediate plate 6! secured to and movable with plate 35.

Bearing retainers In order to prevent the bearing ti from moving with the shifter bars 33 and 34 as they are returned to their normal position and especially to prevent movement of the bearing as a pusher moves over the bearing to get behind it, mechanism is provided which will retain the bearing at a station after it is moved thereto. Figs. 5, 6 and 11 illustrate this mechanism which comprises arch-shaped supports "iii, l i, .512 and it. All supports being identical, only one will detailedly be described. Support iii, at station )3, bridges the shifter 32 and the bearing 35 therein and is rigidly bolted to the head bracket 23. The cross bar of the support has a central, vertical slot in which a lug it slidably fits, this lug having an elongated slot Ma through which a bolt Mb extends threadedly to engage the cross bar. This lug "it may be adjusted vertically relatively to the shifter extending through the support it. Support '5 E, between stations C and D, has an adjustable lug it"; like lug i i. A bar it is suspended between supports it and ii, said bar being adjustably bolted to the lugs and it of the respective supports. of and centrally located relatively to the shifter 32, the lugs it and 25 being so adjusted on their respective supports as to maintain the bar it so that it clears the bearing 35 passing beneath it longitudinally.

Bar it has a plurality of slots it and. it, positioned ahead of stations B, C and D respectively. In each slot there is pivotally supported a retainer or detent 853, 8! and 82 respectively. All retainers or detents being alike only the one numbered 8!, Fig. 6, will detailedly be described. The detent is hinged on a cross pin 83 in rod 16.

This bar 2'5 is longitudinal Another cross in 86, transversely through slot '58, extends through a hole 85in the detent, larger in diameter than pin 84 so that the detent can move by gravity to have its bottom corner extend into the path of the bearing moving longitudinally beneath the bar 26. Thus when pushers in the shifter move said bearing forwardly toward an advanced station, the bearing, passing beneath a detent, will push it upwardly and when the bearing is past the detent, it will drop by gravity, extend beyond the trailing edge of the bearing and so prevent its movement in the opposite direction when the shifter is moved rearwardly toward its normal position.

A detent supporting bar so is similarly suspended between supports I2 and 53 so as to ex.- tend longitudinally above the central core section 35 of the shifter 32. Bar 90 has a plurality of retainers or detents 9i, $2 and 93, similar to detents in bar it and positioned respectively ahead of stations E, F and G.

Bearing Zocators The bearings placed in the machine are conveyed into successive stations, at one of which the bearing is drilled and at another, a tang is formed in one of the straight edges of the bearing. The several pairs of pushers on the shifter move the bearings into said stations and the retainers or detents hold the bearings against reverse movement by the shifter as it returns to normal position. It is of the greatest importance that the bearings be precisely located at the stations D and G, for the drilling operation takes place at station D and the tanging at station G. The retainers or detents are not designed pre-- cisely to locate the bearings, therefore special locating stops are provided at the operation stations D and G. Figs. 10, 11 and 1% show these stops in detail.

A pair of oppositely disposed locating stops Iilfi and NH are provided for positively locating the bearing, advancing under the influence of pushers 58D, relatively to the drilling center designated by the circle 2&2 in Fig. 11'. Inasmuch as both stops are alike only one will be described detailedly. Figs. and show the stop IfiI as comprising a block having an edge engaging the outer surface of shifter rod 34 and a lip portion extending over but spaced from the shifter rod.

Two elongated slots I82, parallel to the path of bearing movement, are providedin the block of stop itl, said slots each receiving a bolt threaded into the bed plate 25. A spring I t3 interposed between stop WI and an abutment member I84 on the bed plate, yieldably urges stop block Ii toward the loading end of the machine (left, Fig. 16) so that the end of slots I62 move adjacent abutment member Ifid, normally engage the respective bolts extending therethrough.

The lip portion of the stop block extending over shifter bar 34 has a slot in the surface adjacent said bar, said slot being at right angles to the path of bearing movement. This slot pro- Vides a slideway for the stop latch I05, the outer end of which is out of the path of bearing movement when fully retracted. Stop latch I135 rests upon and is slidable transversely of the bar (it. The surface of stop latch I 35 engaging the shifting bar Ed has an angular, transverse slot I06, its one open end, toward pusher 500, being closer to the path of bearing movement than the other open end.

A pin It! extending from the shifter bar at is spaced a predetermined distance from stop I Ill,

when the shifter 32' isin normal position. Pin IE7 is so located on bar 34,. that when said bar is moved outwardly from normal position or toward stop IIlI, it will enter slot I06 and, due to the angularity of said slot, will cam stop-latch I outwardly into the path of bearing movement. The pin id? is so located relatively to pushers 590, that said pin will actuate the latch I85 into the path of the approaching bearing, moving ward station D under the influence of pushers 5H0, thereby providing. a precise locating stop at this station D. If, while being moved forwardly toward station D by pushers 560, the bearing is moved after engaging latch 35, stop block IIlI will be moved on'the. bed plate against the efiect of cushioning spring I03.

The return movement of the shifter 32, after pushers EEC have moved a bearing into station D and. consequently after pin I 01 has passed through slot lot and cammed latch Hi5 into the.

path of bearing movement, will cause said. pin Ill-I to enter slot Ida and now pin Iil'I' will cam the latch I35 into normal position again, out of the path of bearing movement thereby permitting the bearing at station D to be moved past stop latch IE5 as pushers 56D move said bearing toward station E on the next forward movement of the shifter out of normal position. Thus stop latch I515 permits a bearing to be moved forwardly from station D to station E, but is actuated to stop the bearing approaching station D on the same stroke of shifter forwardly out of normal position.

Two more, oppositely disposed locating stops I25 and I26 are provided at station G where mechanism operates on the bearing to form a tang I2? in one of its straight edges. Inasmuch as a transition in the construction of the shifter 32 takes place immediately after the station E, that is, up to and at station E, the bearings 35 are supported between spaced, parallel bars 33 and 35 whereas, after station E, they are supported by central core 35, locating stops I25 and IE6 are provided in said central core. Referring particularly to Figs. 13 and 14, a transverse slot I28, indicated by dotted lines in Fig. 14, is provided in the surface of supporting plate 60 en gaged by the intermediate plate 6|. In this slot E28 and at one side of plate 58, a block, forming stop I25 is pivoted upon a pin I29, the hole in the stop block I25, through which pin I 29 extends being elongated. Another pin I til, carried by the stop block I25 extends upwardly into an elongated slot in the surface of the intermediate plate BI which is attached to the reciprocating outer plate 35 of the core. A hair-pin shaped spring 32 is interposed between the stop block I25 and the edge of transverse slot I 28, said spring yieldably urging the block I25 toward the station G so that the pin I29 is engaged by the end of the elongated hole in said block. more remote from said station.

Stop block I26 is identical to block I25. Block iit is pivoted upon pin I33 passing through the elongated hole in said block. A pin I34 extends from block I 26 into an elongated slot in the surface of plate 5!. A hair-pin spring I 36 urges the block I26 toward station G, limited by pin I33. Stop blocks I25 and I26 when in this normal position as shown in Fig. 14 will locate the engaging bearing at station G so that the tanging mechanism at this station will form the tang at the predetermined position in the one straightedge of the bearing.

As. previously stated, pin I3Il on the stop block w 4 I extends into a longitudinal slot in the adjacent surface of plate GI, said slot being longitudinal of said plate and having two disaligned portions I37 and 13s connected by an angular portion i353. Similarly, pin I35 of stop block extends into a longitudinal slot in plate EI, this slot also having two disaligned portions Idil and MI connected by a slanting portion 142. Portions I31 and ifill of said slots are parallel with the path of bearing movement by the shifter portion 35 and are spaced a greater distance from the respective sides or edges of plate iii than are the portions I38 and MI of said slots. Thus as long as pins I38 and It l of the respective stop blocks 425 and I26 travel through the slot portions I3'I--l 463, said blocks will be held in their fully retracted positions in the transverse slot I28 in plate BI thus being completely out of the path of travel of the bearing. However, when pins I and IM traverse the slanting portions I39 and I42 respectively and enter slot portions I38 and MI then the stop blocks are moved outwardly, as shown in Fig. 14, into the path of bearing movement, being operative to stop said bearing movement to locate the bearing in the proper position at station G. The slots i3?i38--l38 and Mil-HiI-AQZ are so located in plate 6! that while the shifter 32 and its plates and El are moving forwardly from their normal position, pins i3 and IBQ of the stop blocks 125-426 respectively will travel through the slot portions I3'I-Me and maintain said stop blocks retracted a sufiicient length of time to permit pushers G to move the bearing already operated upon at station G past the locating stop toward the unloading end of the machine. After said finished bearing has passed the retracted locating stop blocks and before the bearing, moving forwardly out of station F under the influence of pushers 59F, reaches station G,

pins 535 and 534 will pass from slot portions i I3'Il il through the slanted portions wit-4&2 into the portions Nil-l4! respectively, at which time the stop blocks wt and 12s are extended so as to lie in the path of movement of the bearing approaching from station F. If pushers 59F move the bearing forwardly a slight distance after it has engaged the stop blocks I25--I25, said blocks will move with said bearing and compress springs I32-l35. However, when the shifter and pushers 5% start on their return to normal movement, springs fill-435 will move the stop blocks I25i26 back to normal position, thus properly locating the bearing relatively to the tanging mechanism at station G.

Clamping mechanism at drilling station D After the pushers 5130 have moved a bearing 3I against the locating stops I05 at station D, the mechanism for rigidly clamping the bearing upon the machine for the purpose of drilling a hole 15!! in the bearing becomes effective. The clamping mechanism is pivotally supported in a housing i5I which has a base provided with elongated holes I52 through which bolts I53 extend to securethe housing to the standard 2!. The elongated holes I52 permit the housing to be adjusted on the standard ZI longitudinally of the path of 'movement of the bearing in the machine. Housing IEI comprises a ring-shaped portion i5 i through which the shifter mechanism 32 extends so that the bearings 3!, moved by the shifter, are concentric with the ring-shaped portion I54 as they pass therethrough.

Housing I5! has two spaced, parallel ears I55 extending from its outside, said ears having openings for supporting the stub shaft I56, the axis of which is parallel with the center line of bearing travel and also substantially in the horizontal plane passing through the center of the semi-cir-' cular bearing at station D in the machine. One end of shaft I55 extends outside one of the cars !55 and has the clamping lever I5! attached thereto, said lever extending inwardly so that its free end is directly over the line of travel of the bearings as they are moved through the machine. At its free end, lever I5? has a curved lip I58 extending at right angles from said lever, the curvature of said lip coinciding with the contour of the semi-circular bearings so that lever I5! may be actuated to move its lip we to rest upon the bearing located at station D by the stops it and IOI and clamp said bearing immovably upon the bed plate of the machine.

Between the parallel ears $55 of housing I54, shaft 56 has one end of lever 560 attached thereto. Housing has a hollow bulge Iiil extending from it which provides a platform plate Hi2 upon which a bracket 583 is secured. One end of a hydraulic cylinder ltd is hingedly attached to bracket I63, a piston rod 555 extending from the other end of said cylinder and being adjustably attached to the free end of lever ass. When piston rod I65 is in fully extended position as shown in Figs. 2 and levers Hit and I5? are held to maintain the curved clamping lip 158 of lever I5? lifted so that the bearing 3!, being moved from station C to station D by shifter pushers 5M3, may pass beneath said clamping lip 55%. However, when said bearin is properly located at station D, the actuator 56, a hydraulic cylinder, is rendered active to retract the piston rod E55 whereby levers Hill and E51 are actuated to move the clamping lip I58 into nesting engagement with the bearing beneath it and thus rigidly clamp said bearing to the machine. Inasmuch as the bearing rests upon the stationary bed plate of the machine and is confined between the parallel bars 33 and E i of the shifter, clamping of the bearing to the machine will not preclude the return movement of said shifter bars while the bearing is so clamped.

The hollow bulge iti on housing has a lug its on its outer surface, said lug having a hole in which the shaft it? of adjusting wheel its is rotatably supported. The shaft 5 I 8 extending into the hollow bulge has a worm gear its thereon which cooperates with other gearing ill? within the bulge and the housing to effect certain adjustments when wheel N33 is rotated. This will be described detailedly hereinafter.

Drilling mechanism It has been stated that housing H55 comprises a ring-shaped portion fit through which the bearings 35 are moved so that both housing portion we and the semi-circular bearings are conentric. The inner, annular surface of the ringshaped housing portion i541 is machined to provide a bearing in which the ring-shaped portion N5 of bracket lie rotatably fits. (See Fig. '7.) Bracket I'it has a platform plate ill adapted to have the drilling apparatus attached thereto. A ring gear 518, having teeth in its outer peripheral surface, is attached to the inner end of the ringshaped portion HE. A ring-shaped retainer H9 is secured to the ring gear This retainer seats in an annular recess in the housing ring I5 3, of greater diameter than the inside diameter of said ring I5d in which portion I75 is rotatably supported. Thus portion H5 is rotatably locked a in housing portion 55%. The ring gear 518 is operatively connected to the gearing lie, so that operation of the wheel M33 acts through gears I69, I70 and 78 to rotate the bracket portion I15 relatively to the stationary housing portion ltd. This results in a movement of drill carrying plate Iii in a circular path concentric to the center of the semi-circular bearing clamped at station D.

The perspective View of the bearing iii in Fig. 8/s'hows hole Hit the-r in to be midway between its curved edges and countersunk at each end to insure removal of any burrs on either surface of the bearing. Burring both ends of hole Hit requires two oppositely acting boring tools, the one operative to drill the hole and countersink its one end, the other, operative to countersink the opposite end of the hole.

The drilling and countersinking apparatus used in the present machine and shown in the accompanying drawings is of standard design, available in the open market and therefore no detail illustrative thereof is included the drawings nor will more than a general description thereof be given. The apparatus comprises a standard I80, bolted to the plate Iii and having a "housing It! attached to its lower end. A housing iti is carried by housing Edi as is also a main driving motor I83. An extension on housing i82 carries the chuck I84 in which the combination. drill and countersink 585 is secured. As shown in Fig. 2, drill 685 is beneath the bearing 3! at station D and is normally spaced therefrom as to permit the bearing to pass over it.

Another housing 86 is attached to the of standard I80. This housing I86 rotatably supports the chuck it? so that its contained countersink bit I88 is coaxially aligned with the drill I85. Bit lad is normally maintained. above the bearing 3i at station D to permit said bearing to pass beneath Lever I89 is operative to move the chuck It? and its contained countersink bit I88 toward the bearing. This lever I39 has a rod 19c swivelly secured thereto, said rod being at tached also to one end of lever iSi pivoted to the housing I82. Electric motor 83 operates continuously while the machine is being operated. Through suitable connections in housings WI, 582 and 35 and hollow tube 592, it rotates the chucks 84 and EM. Motor 833 also rotates a cam through a slip clutch mechanism in housing i82. The cam has a lug engageable by a dog on a lever secured to stub shaft I93 inside housing Hi2. shaft 593 has a lever its secured to it outside the housing, which is engageable to actuated by the armature Hi5 of the electromagnet its so as to move the dog from the path of the cam lug and permit the cam to be rotated by the slip clutch driven by motor The driving connections between the electric motor 533 and the cam are such that said cam makes one complete revolution for each cycle of drilling operation. The cam in turn is arranged to actuate the drill 585 toward the bearing clamped at station D and complete the drilling and countersinking operation of drill 135 during one portion of the turn while during another portion thereof, the countersinking tool I 88 is moved toward said bearing for countersinking the other end of the drilled hole. When the cam has actuated both bits I85 and I38 to move toward the bearing successively to do their task and then has returned them to normal position, the dog associated with shaft I93 stops cam rotation which will not again be repeated until the electromagnet It! has been id energized to actuate lever its, shaft 993 and the dog attached thereto to release said cam.

The oppositely disposed, axially aligned drilling and countersinking apparatus is shown in Fig. 2 to be directly vertical oi the machine bed 25 thus the hole I53 in the bearing will be substantially midway between its two straight edges engaging said machine bed. If it is necessary to drill the hole closer to one of said straight edges than the other, the wheel let is operated to rotate the drill apparatus supporting bracket I16 within the housing portion I54 in a clockwise or counterclockwise direction respectively. If said hole 555 is to be closer to one curved edge of the bearing than the other, then the bolts I53 are released and the entire housing I5I is moved in one direction or the other on the machine. At any adjusted position, bits I and I 38 are diametrical relatively to the bearing 3! at station D for the pivotal point of rotation adjustment of the drilling unit is the center of the semi-circular bearing.

Tangz'ng mechanism at station G As shown in Fig. 8, the bearing 3! has a tang I21 extending outwardly from the one straight edge thereof. The mechanism for forming the tang is supported by the bracket 285i adiustably secured to the standard 22. Figs. 1 and 3 illustrate this mechanism as comprising a plate 21!! having elongated slots 20:! through which bolts 2B3 extend to screw into bracket 2%, thereby providin adjustment of plate ZiiI on bracket 2M! transversely of the machine which adjustment is at right angles relative to the adiustability of bracket 2th on the standard 22.

Plate 26! has a stub shaft 2M, upon which the two levers 205 and 265 of the scissors-like tanging mechanism are pivotally supported. The longer, depending portions of levers 2&5 and 296 are tied together by the toggle links g ll and 2838. The hinged joint 205 of links 25!? and 2&3 has the piston rod 2 I0 attached thereto, the cylinder ZI I, containing the piston to which rod 2M! is attached, being hingedly secured to an extension 2 I2 on lever 286.

The shorter end of lever 285 has an anvil 2I5 secured thereto, said anvil having a portion 2H5 operative, when the lever 2 35 is actuated out of normal position by cylinder 2! I, to engage the bearing 3! adjacent its one straight edge and clamp it tightl upon the stationary plate 5!! which, as has been described, is secured to the bed plate 25. The shorter end of lever 22% has a shearing and bending plate 2H secured thereto which, when lever 255 is moved out of normal position, is moved to engage the bearing now clamped upon the plate so by anvil 2 l The end of the plate 2 I i engaging the bearing is so shaped that the two sides of the plate will shear the bearing while the portion between said sides will bend the sheared bearing portion outwardly into a shallow recess in the face of the anvil 2P5 to form tang H21.

Lever 286 has a stop lug BIB which normally engages a projection 2 I 59 on plate 2i i. A substantially heavy coil spring 225 has its one end engaging a flat surface provided on the shorter end of lever 285, the other end of the spring resting upon the abutment shelf 22E on plate 253 I. This spring 22c exerts a constant force to rotate the two lovers 2% and 296, tied together by the toggle links as? and 2'138, in a counterclockwise direction (Fig. 3), this rotation, however, being prevented due to the engagement of lug sit, on lever 2%,

11 with the projection 2 I9 on plate 25L Thus normally, the anvil 2I5 and plate 2H on levers 2G5 and. 286 respectively, are held spaced from the bearing SI, even though spring 220 is constantly exerting a force to move the anvil 2 I against the bearing. However, when the cylinder 2 I I is energized to retract the piston rod 2ID, the toggle links 257 and 258 will be moved toward align ment, causing the lower ends of levers 2G5 and 256 to be moved apart. Lever 205 will move before lever 205 due to the influence of spring 2253 upon lever 285 in the same direction. Lever 256 will remain stationary, against stop 2I9, until lever 255- has moved sufficiently to cause the anvil portion 2H5 to engage the bearing SI and press it upon the plate 55 after which continued movement of the toggle links by the piston rod 2 I5 will move lever 2B5 clockwise about pivot shaft 2% causing the shear plate 2Ii to engage the bearing and form the tang therein. Fig. 3 shows the stationary bed plate 25 and the plate 60 attached thereto undercut to provide a passageway for the tanging plate 2 I! on lever 206.

Timing of the machine Fig. 16, the timing chart, shows one complete cycle of the machine as comprising twelve intervals. During intervals 1 and 2, the carriage or shifter is moved from normal to full outward position during which time bearings in or on the shifter are each moved from one station, forward to the succeeding station. Beginning at the 2.5 and continuing through to the 10.5 interval the bearing is clamped at station D. During the intervals i and 5, the carriage or shifter is returned to normal position. While clamped at station D and during the intervals 4 to inclusive, the clamped bearing is drilled and countersunk. During the last half of interval 3 and through in? tervals 4 and 5, the tang is formed in the bearing.

The schematic Fig. 1'! shows a motor 25!! having suitable gear reduction mechanism 25! to drive shaft 252 at a predetermined reduced speed. This motor and shaft are attached to the machine in any suitable location. Shaft 252 has a plurality of actuating cams 253, .254 and 255 and 256- mounted thereon so as to rotate therewith. Cam 253 actuates the two hydraulic valves 25! and 258 which control fluid pressure flow from the source of supply 260 to the two ends of cylinder M for actuating the piston and rod, 43 to move the shifter forward out of normal position and then rearward into normal position respectively. Control valve 25! normally directs fluid flow from thesource 266 to the end ofrcylinder Ififi so that the clamp lever I5! is maintained in normal bearing disengaging position as shown in Fig. 2. However, cam 25 is operative to actuate valve 25I to direct fluid to the opposite end of cylinder I64 at which time it will actuate the clamp lever I51 to engage and clamp the bearing to the machine. Valve 262, when not actuated by cam 255, directs fluid pressure from the source of supply into the upper end of cylinder 2I I so that its piston rod 2H3 actuates the toggle links and 258 to hold levers 205 and 206 free of the bearing in the shifter. However, as soon as the cam 255 engages and actuates valve 252, it will connect the lower end of cylinder 2II with the pressure supply causing the piston rod 2I0 to actuate toggle links 2iJ'I2B8 to move levers 255 and 206 so that their respective anvil and tanging plate, clamp and tang the bearing respectively. The fourth cam 256 on shaft 252 is operative to close switch 253 for energizing the electromagnet I913 12 to release the drilling and countersinking apparatus and permit it to complete its cycle of operation.

The Fig. 15 is a schematic view showing all cams 253, 254, 255 and and their associated control devices in their relative angular positions.

Resume in terms of machine Operation To operate the aforedescribed machine, the attendant opens the main valve 215 at the source of fluid pressure supply 2% permitting the fluid. under pressure, to be directed into the various connections with the hydraulic control devices. At the same time master switch 2% is closed con necting motor E83 and -2 as well as the electromagnet I96 with the electric power lines 2i 'i2'5$. This renders motors 33 and 255 operative. Operation of motor rotates the shaft 252 and its cams 253, 25%, 255 and 25%. They in turn render their respectiv control devices 257-258, EM, 252 and 253 operative to control their respective machine actuators, cylinders it, I 5 3 and ill I and the eleotromagnet ESE active at properly timed intervals.

With the machine in operation, bearings 3 I, in the hopper feed 39, are directed to fall into position at station A. The bearing is positioned between the two parallel bars 33 and 3d of shifter 32 with the two straight edges of the bearing resting upon the bed plate 25, each parallel to a shifter bar and in close proximity thereto. When cam 253 actuates valve 25? to direct fluid pressure from the source 255 to cylinder M, piston rod 43 is actuated to move the shifter 32 forward from its normal position. As the shifter 32 moves forwardly, the pushers 59A will move the bear ing from station A into station B. The bearin moves beneath retainer by raising it, however, when the shifter has moved forwardly its full range of travel, the bearing will have been moved past the retainer 86 suiiiciently to permit it to drop, by gravity, so as to retain the bearing at station 13. Now cam 253 will engage and actuate valve 258 which causes the cylinder to be activated to return the shifter into normal loading position. On the next forward stroke of the shifter, pushers 5933, back of the bearing at this station, will mov said bearing past retainer BI into station C. Concurrentl a new hearing at the loading station is moved into station E. Following the progress of the bearing now at sta tion 0, pushers 550 will move said bearing past retainer 32 and into engagement with the locating stops I and I JI at station D. After the bearing has engaged the locators at station D, the cam 25 3 operates the control device 25! to effect energization of actuator I64 to move the lever I5? and its clamping portion I53 into engagement with said bearing to clamp it rigidly upon the bed plate 25 of the machine. While the bearing is so clamped, the shifter 32 is returned to its normal, loading position. Also, while the bearing is clamped by lever I51, cam 255 actuates the control device 253 to effect energization of the electromagnet I56 which renders the drilling mechanism effective to drill and countersink the clamped hearing at station D, the drill I85 first performing its drilling and countersinking operation.

As a result of the next three successive forward movements of the shifter 32, this bearing, drilled at station D, will be advanced successively into stations E, F and G by pushers 50D, E and 5&1 respectively. At station G the bearing is preeating stop, engageable by said pin to move the stop in the path of a bearing approaching said predetermined station during the final range of movement of the shifter out of normal position, said pin engaging the cam to move it out of the path of the bearing as the shifter is returned to normal position, whereby the bearing occupying the said predetermined station is movable past the stop during the initial range of movement of the shifter out of normal position; means operative to engage and clamp the bearing upon the machine after said bearing engages the stop; means operative to drill said bearing while clamped upon the machine; a locating stop at a second predetermined station; a pincer at said second station, said pincer having two levers, one for clamping the work piece, the other for shear ing said clamped workpiece; and means for actuating the shifter, the clamp, the drill and the pincer, all at predetermined times, one relatively to the other and in recurrent sequence, said means consisting of an individual hydraulic motor for each, the shifter, the clamp and the pincer and an electric motor for the drill, each motor being provided with an individual control device each of which is periodically actuated, to render its respective motor operative, by a cam, all cams being driven by a common shaft powered by an electric motor.

4. In a machine for drillin and forming a tang on one straight edge of a circular bearing, the combination of, a reciprocative shifter comprising two spaced parallel bars slidable on a stationary part of the machine and forming guide rails between which the straight edges of a semi-circular bearing are placed for guiding movement of the hearing longitudinally between the guide rails, said shifter having a plurality of pushers engageable with the rear edges of bearing elements placed between the guide rails for moving the bearing elements from one station to another in the machine as the shifter is moved in a forward bearing a 'vancing direc tion, detent means on the machine for engaging the bearings at each station to prevent return movement thereof as the shifter moves in a re traction movement to its normal position, locating stop means on a stationary part of the machine adjacent a work station for engagement by a bearing element to position the same in a work station, camming means between he locating stop and the shifter operable by the shifter to move the locating stop into the path of a bearing clement approaching a work station and during the final portion or" the forward movement of the shifter, said shifter moving the lo eating stop out of the path of the hearing as the shifter returns to its normal position, whereby the 'bearing occupying the work station position is movable past the locating stop during the initial portion of the forward movement of the shifter/drilling means on the machine at one of the work stations having a locating stop, means operative to engage and clamp a bearing upon the machine in the drilling station after the bearing engages the stop at the station, a pincer at a second work station having a locating stop for positioning of a bearing relative to the pincers, said spincers having two levers one of which clamps the work-piece on the machine and the other of which shears and forms a tang in an edge of the bearing, and means for actuating the shifter, the clamp, the drill, and the pincer at pre-determined intervals one relative to the other in recurrent sequences, said means consisting of individual motor means for the shifter, the clamp, the pincers and the drill, each of said motor means being provided with an individual control device to render the said motor means operative, all control devices being operative by individual cams driven concurrently by a common shaft powered by an electric motor.

5. A machine in accordance with claim t in which one portion of the shifter guides for-- ward movement of bearing elements through the machine by engagement with the lower edges of the bearing elements and a second portion of the shifter guides movement of the bearing elements through the machine by engagement with the internal periphery of the bearing elements.

6. A machine in accordance with claim 4 wherein one portion of the shifter comprises spaced parallel guide rails for engaging the stationary edges of a semi-circular bearing for longitudinal guiding movement thereof and a secend portion of the shifter comprises a core plate positioned internally of the bearing for supporting the same and guiding the bearing lon gitudinally relative to the spaced parallel-guide rails, and further wherein the pushers in that portion of the shifter consisting of the parallel guide rails are placed within the guide rails and the pushers within that portion of the shifter comprising the core plate are placed in the core plate.

7, In a machine in accordance with claim 1 wherein the bracket supporting the drilling apparatus is movably supported upon the machine for adjusting the position of the drilling appae ratus relative to the ends of the bearin in the drilling station.

HOOPER J. HOUCK. RICHARD M. MORGAN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,757,415 Conway May 6, 1930 1,812,350 Lingwood June 30, 1931 1,846,645 Lach Feb. 23, 1932 1,986,699 Winterkamp Jan. 1, 1935 2,049,400 Straw-n et a1. July 28, 1936 2,227,145 Lex et a1 Dec. 31, 1940 2,238,921 Waldsmith Apr. 22, 1941 2,249,230 Schafer July 15, 1941 2,302,878 Muhl et al Nov. 24, 1942 2,371,906 Millholland Mar. 20, 1945 2,392,169 Mansfield Jan. 1, 1946 2,462,327 Mills Feb. 22, 1949v 2,475,091 Hackman July 5, 1949 

